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тАО05-13-2003 03:03 AM
тАО05-13-2003 03:03 AM
pairevtwait and pair state
Hi
I'm worried about pairevtwait command.
I have two partitions on a XP512 that are periodically resynchronized.
When my pair is synchronized (PAIR state), I run pairsplit command and use pairevtwait to wait for SSUS state. But when pairevtwait finishes, pairvolchk and pairdisplay commands show some S-VOL ldevs are in COPY state (P-VOl are always in PSUS state). After a few seconds, those ldevs reach SSUS state...
Is this behaviour right ?
I always trusted in pairevtwait. After pairevtwait asserted pair is in SSUS state, my script starts to activate the volume groups. Now I think vgchange is running at the same time that those S-VOL ldevs are in COPY state. May this be dangerous ? or, perhaps, XP guarantees no write access from 'vgchange' command is done until all interal COPY access are done ?
I'm worried about pairevtwait command.
I have two partitions on a XP512 that are periodically resynchronized.
When my pair is synchronized (PAIR state), I run pairsplit command and use pairevtwait to wait for SSUS state. But when pairevtwait finishes, pairvolchk and pairdisplay commands show some S-VOL ldevs are in COPY state (P-VOl are always in PSUS state). After a few seconds, those ldevs reach SSUS state...
Is this behaviour right ?
I always trusted in pairevtwait. After pairevtwait asserted pair is in SSUS state, my script starts to activate the volume groups. Now I think vgchange is running at the same time that those S-VOL ldevs are in COPY state. May this be dangerous ? or, perhaps, XP guarantees no write access from 'vgchange' command is done until all interal COPY access are done ?
2 REPLIES 2
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тАО02-13-2007 04:03 PM
тАО02-13-2007 04:03 PM
Re: pairevtwait and pair state
Hi Oscar Sastre,
# pairevtwait -g -t 300 -s pair
Issue some interval time for resync & Wait for PAIR state to come up.
Sivam
# pairevtwait -g
Issue some interval time for resync & Wait for PAIR state to come up.
Sivam
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тАО02-14-2007 03:20 AM
тАО02-14-2007 03:20 AM
Re: pairevtwait and pair state
Hello Oscar,
Ensure you have system option mode 122 enabled. this is to suppress the quick split functionality.
The normal behaviour is to get the data flushed to the drives, then update the S-VOL before the LDEV is put into SSUS state. With mode 122 enabled, the pairsplit command will get completed when the above process is completed.
Ensure you have system option mode 122 enabled. this is to suppress the quick split functionality.
The normal behaviour is to get the data flushed to the drives, then update the S-VOL before the LDEV is put into SSUS state. With mode 122 enabled, the pairsplit command will get completed when the above process is completed.
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